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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* Copyright 2009-2011 Jörg Hermann Müller
*
* This file is part of AudaSpace.
*
* Audaspace is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* AudaSpace is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Audaspace; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file audaspace/sndfile/AUD_SndFileReader.cpp
* \ingroup audsndfile
*/
#include "AUD_SndFileReader.h"
#include <cstring>
sf_count_t AUD_SndFileReader::vio_get_filelen(void *user_data)
{
AUD_SndFileReader* reader = (AUD_SndFileReader*)user_data;
return reader->m_membuffer->getSize();
}
sf_count_t AUD_SndFileReader::vio_seek(sf_count_t offset, int whence,
void *user_data)
{
AUD_SndFileReader* reader = (AUD_SndFileReader*)user_data;
switch(whence)
{
case SEEK_SET:
reader->m_memoffset = offset;
break;
case SEEK_CUR:
reader->m_memoffset = reader->m_memoffset + offset;
break;
case SEEK_END:
reader->m_memoffset = reader->m_membuffer->getSize() + offset;
break;
}
return reader->m_memoffset;
}
sf_count_t AUD_SndFileReader::vio_read(void *ptr, sf_count_t count,
void *user_data)
{
AUD_SndFileReader* reader = (AUD_SndFileReader*)user_data;
if(reader->m_memoffset + count > reader->m_membuffer->getSize())
count = reader->m_membuffer->getSize() - reader->m_memoffset;
memcpy(ptr, ((data_t*)reader->m_membuffer->getBuffer()) +
reader->m_memoffset, count);
reader->m_memoffset += count;
return count;
}
sf_count_t AUD_SndFileReader::vio_tell(void *user_data)
{
AUD_SndFileReader* reader = (AUD_SndFileReader*)user_data;
return reader->m_memoffset;
}
static const char* fileopen_error = "AUD_SndFileReader: File couldn't be "
"read.";
AUD_SndFileReader::AUD_SndFileReader(std::string filename) :
m_position(0)
{
SF_INFO sfinfo;
sfinfo.format = 0;
m_sndfile = sf_open(filename.c_str(), SFM_READ, &sfinfo);
if(!m_sndfile)
AUD_THROW(AUD_ERROR_FILE, fileopen_error);
m_specs.channels = (AUD_Channels) sfinfo.channels;
m_specs.rate = (AUD_SampleRate) sfinfo.samplerate;
m_length = sfinfo.frames;
m_seekable = sfinfo.seekable;
}
AUD_SndFileReader::AUD_SndFileReader(boost::shared_ptr<AUD_Buffer> buffer) :
m_position(0),
m_membuffer(buffer),
m_memoffset(0)
{
m_vio.get_filelen = vio_get_filelen;
m_vio.read = vio_read;
m_vio.seek = vio_seek;
m_vio.tell = vio_tell;
m_vio.write = NULL;
SF_INFO sfinfo;
sfinfo.format = 0;
m_sndfile = sf_open_virtual(&m_vio, SFM_READ, &sfinfo, this);
if(!m_sndfile)
AUD_THROW(AUD_ERROR_FILE, fileopen_error);
m_specs.channels = (AUD_Channels) sfinfo.channels;
m_specs.rate = (AUD_SampleRate) sfinfo.samplerate;
m_length = sfinfo.frames;
m_seekable = sfinfo.seekable;
}
AUD_SndFileReader::~AUD_SndFileReader()
{
sf_close(m_sndfile);
}
bool AUD_SndFileReader::isSeekable() const
{
return m_seekable;
}
void AUD_SndFileReader::seek(int position)
{
if(m_seekable)
{
position = sf_seek(m_sndfile, position, SEEK_SET);
m_position = position;
}
}
int AUD_SndFileReader::getLength() const
{
return m_length;
}
int AUD_SndFileReader::getPosition() const
{
return m_position;
}
AUD_Specs AUD_SndFileReader::getSpecs() const
{
return m_specs;
}
void AUD_SndFileReader::read(int& length, bool& eos, sample_t* buffer)
{
int olen = length;
length = sf_readf_float(m_sndfile, buffer, length);
m_position += length;
eos = length < olen;
}
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